board: rockchip: Add support for rk3588 GenBook

Add support for Cool Pi GenBook, it works as a carrier board
connect with CM5 SOM.

Specification:
- Rockchip RK3588
- LPDDR5X 8/32 GB
- eMMC 64 GB
- HDMI Type A out x 1
- USB 3.0 Host x 1
- USB-C 3.0 with DisplayPort AltMode
- PCIE M.2 E Key for RTL8852BE Wireless connection
- PCIE M.2 M Key for NVME connection
- eDP panel with 1920x1080

Tested by Armbian boot on USB disk.

Change-Id: I4d9b8572dc7c400077dde666633f3fea1b47dd03
Signed-off-by: Andy Yan <andyshrk@163.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>

include/configs/genbook-cm5-rk3588.h

@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+
+#ifndef __GENBOOK_CM5_RK3588_H
+#define __GENBOOK_CM5_RK3588_H
+
+#define ROCKCHIP_DEVICE_SETTINGS \
+		"stdout=serial,vidconsole\0" \
+		"stderr=serial,vidconsole\0"
+
+/*
+ * As a laptop, there is no sdmmc, and we want to
+ * set usb the highest boot priority for third-part
+ * os installation.
+ */
+#define BOOT_TARGETS "usb mmc0"
+
+#include <configs/rk3588_common.h>
+
+#endif /* __GENBOOK_CM5_RK3588_H */